Given a non-empty array of integers, return thekmost frequent elements. Example 1: Input: nums =[1,1,1,2,2,3], k =2 Output:[1,2] Example 2: Input: nums =[1], k =1 Output:[1] Note: You may assumekis always valid, 1 ≤k≤ number of unique elements. Your algorithm's tim...
备注:在 LeetCode 中的运行时间也不是特别慢。 Java 实现 importjava.util.Map;importjava.util.HashMap;importjava.util.List;importjava.util.ArrayList;classSolution{publicList<Integer>topKFrequent(int[] nums,intk){// 统计元素的频率Map<Integer, Integer> freqMap =newHashMap<>();for(intnum : nums...
347. Top K Frequent ElementsMedium Topics Companies Given an integer array nums and an integer k, return the k most frequent elements. You may return the answer in any order. Example 1: Input: nums = [1,1,1,2,2,3], k = 2 Output: [1,2] Example 2: Input: nums = [1], k ...
【LeetCode】347. Top K Frequent Elements Given a non-empty array of integers, return the k most frequent elements. Example 1: Input: nums = [1,1,1,2,2,3], k = 2 Output: [1,2] Example 2: Input: nums = [1], k = 1 Output: [1] No......
Example 1: Example 2: Note: You may assume k is always valid, 1 ≤ k ≤ number of unique elements. Your algorithm's time c...leetcode 347. Top K Frequent Elements 一 题目 Given a non-empty array of integers, return the k most frequent elements. Example 1: Example 2: Note: You...
class Solution: def topKFrequent(self, nums: List[int], k: int) -> List[int]: # 统计 nums 中每个数字出现的次数, # 时间复杂度为 O(n) ,空间复杂度为 O(n) num_to_cnt = Counter(nums) #将 num_to_cnt 中的数字及其出现次数收集到数组中, # 时间复杂度为 O(n) ,空间复杂度为 O(n)...
https://leetcode.com/problems/top-k-frequent-elements/ Given a non-empty array of integers, return the k most frequent elements. For example, Given [1,1,1,2,2,3] and k = 2, return [1,2]. Note: You may assume k is always valid, 1 ≤ k ≤ number of unique elements. ...
[leetcode] 347. Top K Frequent Elements Description Given a non-empty array of integers, return the k most frequent elements. Example 1: Input: AI检测代码解析 nums = [1,1,1,2,2,3], k = 2 1. Output: AI检测代码解析 [1,2]
Leetcode 347. Top K Frequent Elements 0 / 0 / 创建于 5年前 / 之前写的一个很随意的遍历 k 次取最大值,时间复杂度 kn先排序再取的复杂度 nlogn 用最大堆平均复杂度是 nlogkkn>>nlogn>nlogk最大堆 (目前已知最优解)复盘:顺便用 LeetCode 这题的 Testcase 测出了之前写的最大堆 shiftDown 的...
简介:Given a non-empty array of integers, return the k most frequent elements.For example, Given [1,1,1,2,2,3] and k = 2, return [1,2].Note: You may assume k is always valid, 1 ≤ k ≤ num Given a non-empty array of integers, return the k most frequent elements. ...